[PATCH v3 11/20] KVM: ARM64: Add reset and access handlers for PMCNTENSET and PMCNTENCLR register

+ * kvm_pmu_enable_counter - enable selected PMU counter
+ * @vcpu: The vcpu pointer
+ * @val: the value guest writes to PMCNTENSET register
+ *
+ * Call perf_event_enable to start counting the perf event
+ */
+void kvm_pmu_enable_counter(struct kvm_vcpu *vcpu, u32 val)
+{
+	int i;
+	struct kvm_pmu *pmu = &vcpu->arch.pmu;
+	struct kvm_pmc *pmc;
+
+	for (i = 0; i < 32; i++) {

Replace 32 with defined macro please.

+		if ((val >> i) & 0x1) {
+			pmc = &pmu->pmc[i];
+			if (pmc->perf_event) {
+				perf_event_enable(pmc->perf_event);
+				if (pmc->perf_event->state
+				    != PERF_EVENT_STATE_ACTIVE)
+					kvm_debug("fail to enable event\n");
+			}
+		}
+	}
+}
+
+/**
+ * kvm_pmu_disable_counter - disable selected PMU counter
+ * @vcpu: The vcpu pointer
+ * @val: the value guest writes to PMCNTENCLR register
+ *
+ * Call perf_event_disable to stop counting the perf event
+ */
+void kvm_pmu_disable_counter(struct kvm_vcpu *vcpu, u32 val)
+{
+	int i;
+	struct kvm_pmu *pmu = &vcpu->arch.pmu;
+	struct kvm_pmc *pmc;
+
+	for (i = 0; i < 32; i++) {

ditto

+		if ((val >> i) & 0x1) {
+			pmc = &pmu->pmc[i];
+			if (pmc->perf_event)
+				perf_event_disable(pmc->perf_event);
+		}
+	}
+}